Do you mean that it can be used when we need to do bench reinstall?
Because when doing bench update, then all the customization that was done using customize form will remain and no need for exporting and importing it. But when doing bench reinstall (which is used for reset the database), so it will wipe every thing.
Otherwise: why we need to export the customization? Just as backup or we need to import it later after resetting the database using bench reinstall?
Regards
Bilal